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H. A. FELTON.

TENSION DEVICE.

APPLICATION FILED MAY 2, 1918.

Patented Oct. 21, 1919.

2 SHEETS-SHEET1.

H. A. FELTON.

TENSION DEVICE.

4 APPLICATION men MAY 2, 191a.

Patented Oct. 21,1919.

2 SHEETSSHEET 2 UNITED STATES PATENT OFFICE.

HIRAMYA. rntron', or; cannon, MAssAonUsEr'Jis.

' TENSION DEVICE.

To all whom it may concern." r

"Be it known that I, Hnmw A. FnL'roN, a citizen of the United States,residing at Orange, in the county of Franklin and State ofMassachusetts, have invented a new" and useful Tension Device, of whichthe following is a specification.

This invention relates to a tension device capable of general use, butparticularly designed for tensioning silk thread or yarn as it isdelivered to a bobbin or cop for winding thereon.

--The principal objects of the invention are to provide aniinproved'tensioning surface which, while providing the necessarytension, will avoid the common tendency of ordinary tension devices tocause breaks; to provlde'a'construction in which the tenslon can bevaried easily but will not vary unless adjusted intentionally; toprovide a tension ing device in which all parts can be adjusted readilyfor the'purpose of adj usting the tcnsion and changing the course of theyarn through the tension device; and more especially to provide fortensioning the yarn between a pair of flat surfaces, one movablerelatively with respect to the other in such a way that wherever theyarn is placed between them it will'receive the same tenslon and will becapable of bein placed in different locations so as to follow differentpaths and prevent wearing the tension surface in anyone spot, and toprovide an improved tensioning surface that in addition to itstensioning function will clean the yarn. Further ob ects and advantagesof the invention will appear hereinafter.

Reference isto be had to the accompanydrawings, in which 7 Figure 1 isanelevation of a tension clevice constructed in accordance with thisinvention, but shown open;

Fig. 2 is an end View of the same showing a a plate 16.

Specification of Letters Patent. Patented Oct, V Applicationnled May 2,191s. Serial No. 232,147.

over the tightness of the winding and for that reason certaincomplicated compensate 111g devices are employed in addition-to thetension device itself; I find also that it is impossible'to wind thebobbin as soft and loose with these devices as it ought to be in orderto work to the best advantage when it is employed in the loom, or asuniformly hard as some mill people desire. This invention is designed toremedy these difli culties and to provide a tension surface whichwillnot only effect the usual tension operation, but will remove the bunchesand pieces of waste that inevitably cling to yarn, and under ordinarycircumstances are wound on the bobbin with it.

Referring to the drawings it will be seen that the invention is shown asused in connection with the winding of a bobbin 10 with silk yarn. Forthis purpose the usual guide and verticallyreciprocating traveler areemployed.

The tension device itself is shown as mounted on the frame 14 of themachine and comprises a base 15 to which is attached This base supportsa pair of brackets 17' each provided with a pivot socket or hole 18 forreciving a pivot 19 on a pivoted frame 20. In the form shown, this pivotconsists of an integral arm extending outwardly from the frame on eachend and engaging in'the hole 18. One of the brackets 17 is shownremovable and both can be if desired.

The frame 20- is provided with a pair of arms 21 adapted when in use, asshown in Fig. 3, to extend out over the plate 16 or at leastsubstantially parallel with it. These arms support a longitudinal pivotshaft 22 on which is pivotallymounted a plate 23 by means of up-turnedends 24 which have perdue to the weight 25.

The frame 20 is provided with arms 27 on which is adjustably mounted aweight 28 held in position by's'crews 29. This weight extends out beyondthe plate and can be adjusted as desired to hold the weight down withany desired degree of force. 'Furthermore the perforations through theweight 28 for receiving the arms 27 are considerably larger than thesearmsso that the weight can be shifted to an angular position if de-.

sired to provide more tension at one end than at the other so that thethread can enter purpose. Preferably it is held by integral lugs 32 onthe ends of the plates which engage in perforations through the felt tohold the felt pieces stretched in position on the surfaces of theirrespective plates. The lugs on each plate are spaced apart so as topresent a wide surface of flat stretched felt. The yarn or thread isintended to'passbetween these two strips of felt when the upper plate isheld down by theweight 28 as shown in Figs. 3. and 4.

The reason for pivoting the plate 23 is to prevent any difference intension between its outer and inner edge. On account of the weight 25,whenever the plate 23 is brought down its outer edge will engage theouted edge of the plate 16 first, or rather the felt will, and in thisway the two bodies of felt are brought together in a simple mannerwithout rubbing against each other or rubbing over the yarn so as toroll or displace it. It is to be observedthat as the weight 28 can beadjusted to anydesired distance from its pivot the force with which thetension. is applied can be adjusted readily and that it will retain itsadjustment. In this way any desired degree of pressure can be securedand a uniform distribution over the surface of the felt is insured. Thelatter feature is ofspecial importance because obviously if the threador yarn passed over the felt always at the same point it wouldeventually wear a furrow there. It is intended to make adjustmentsso-that' the thread will pass along the surface of the felt indiflterent direc tionsat different times so as to avoid this diflicultyand permitthe felt to be used for a long period of time. This adjustmentis'secured by mounting the porcelain guides '35 on arms 36which areadapted to be ad justed back and forth. They are made adjustable bysimply passing their .ends through holes in the base 15 and securingthem in adjusted positions by means of set screws or the like.

I find in practice that the tensioniug of the yarn by means of feltsurfaces is a useful advance in this art not only because throughoutwhich it is engaged all the time 7 by the surface of the felt, and thistends to remove the waste and irregular portions clinging to it that'otherwisewould be wound on the bobbin. This Way of tensioning isparticularly valuable because byv means of it the bobbin can be woundmuch softer than has been the case heretofore and yet an eventensionmaintained: 'on the -'yarn; so that it will be wounduniformly from ;oneend to the other. Or, if desired, it;can be wound very hard by thisdevice, I find that bobbins can be wound so soft by this mechanism thatexperienced Weaver's are unable to believe that they will operateproperly in a loom and yet no difliculty is met with in weaving fromthem for the reason that they are wound under such uniform 'tension. Thepieces of felt can be used fora long time andwhen too much worn on thesurface can be taken off and reversed so: that they have a longdurability. The function of cleaning the'thre'ad is especiallyimportant;

Although I have illustrated and described only a single form of theinvention, I am aware of the fact that modifications can be guides atthe ends. of said surfaces adjustable substantially in the plane along,which said felt surfaces engage each other to change the course of theyarn along, said surfaces, and means for holding one of said membersagainst the other with a uniform pressure. V

2. Ina tension device, the combination of a stationary member, a pivotedframega'dj acent thereto, and a plate pivotally mounted on said frameand free to swing on its pivot, said plate and first .member havingcooperating tension surfaces for. receiving the yarn between "them, saidplate having a weight on it for holding itslouter edge .down.

3. In a tension device, the combination .of

a horizontal member a pivoted, frame above it, a plate pivotallydepending}from said frame at a distance from the pivot on which the.frame is .mountedand free ,to

swing on its pivot, whereby it] will. exert uniform pressure throughoutits area, 'said plate and first named member having c0- operating flatfelt surfaces for receiving the yarn between them.

4. In a yarn tension device, the combination of a stationary memberhaving a fiat tension surface and a movable member having a cooperatingtension surface between which surfaces the yarn to be tensioned isadapted to be run, means for holding the movable member against thestationary member with yielding pressure, yarn guides at the ends ofsaid surfaces, and means whereby said yarn guides can be adjustedsubstantially in the plane of said surfaces and transversely to thedirection of the yarn to change the direction which the yarn takes inpassing along said surfaces.

5. In a tension device, the combination of a member and a pivoted frameadjacent thereto, a plate connected with said frame, said plate andfirst named member having cooperating felt surfaces for receiving theyarn between them, a weight and means supported by said frame at eachend for supporting the weight, said weight being capable of beingadjusted toward and from the frame independently at both ends to varythe pressure from end to end.

6. In a tension device, the combination of a stationary member and apivoted frame adapted to rest on it, said frame having a plate connectedtherewith, said plate and first named member having cooperating felttension surfaces for receiving the yarn between them, means for holdingthe plate against the first named member with a yielding pressure andmeans for providing different degrees of tension at the two ends of thefriction surfaces.

7. In a tension device, the combination of a member and a pivoted frameadjacent thereto, a plate. connected with said frame, said plate andfirst named member having cooperating tension surfaces for receiving theyarn between them, arms projecting from said frame, and a weightsupported by form pressure throughout its area, said plate and firstnamed member having cooperating tension surfaces for receiving the yarnbetween them, and means for forcing the frame toward the first namedmember.

9. In a tension device, the combination of a stationary member and apivoted frame adjacent thereto, a plate pivotally mounted on said frameand free to swing on its pivot, said plate and first named member havingcooperating tension surfaces for receiving the yarn between them, saidplate having a weight on it for holding its outer edge down, and a stopfor preventing it from swinging down beyond a certain limit.

In testimony whereof I have hereunto affixed my signature.

HIRAM A. FELTON.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. G.

